Our Upholstery pre=spray was carefully formulated to clean like a high PH cleaner but without the risk of browning. As most of you know if you clean a white sofa with a high PH cleaner it may turn brown or yellow several days after you cleaned it. This product was designed as a neutral PH cleaner but still aggressively clean teh stains from the fabric. Don't let yellowing and browning happen to you! The ingredients contained in this product were carefully chosen for their compatibility with Upholstery fabric and their performance against soils commonly found on furniture. Comes in one gallon container This product is ready to use. Just spray on sofa, agitate fabric with brush and extract. PH is 11.7 Price each $9.95 Case (4) Price is 7.95 per gallon